<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>登录界面</h1>
<div>
  <input type="text" placeholder="用户名" v-model="user.username">
  <input type="password" placeholder="密码" v-model="user.password">
  <input type="button" value="登录" @click="login()">
</div>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
      user:{
        username:"",
        password:""
      }
    },
    methods:{
      login(){
        axios.post("/login",v.user).then(function (response) {
          if(response.data==1){
            alert("登录成功");
            location.href="/";
          }else if(response.data==2){
            alert("用户名不存在");
          }else {
            alert("密码错误!")
          }
        })
      }
    }
  })
</script>

</body>
</html>